I'm creating an app that will provide In-App purchase and there's a web version of the app as well, and I want to unify the pricing model based on IAP. So, I want to retrieve the product prices for the Web App using a REST API. Is there such an API?

After updating to XCode 13, I keep getting this error randomly while building/running the project. error: input file R.generated.swift was modified during the build The error goes away after cleaning the project and building/running, but after a couple of builds/runs the error happens again. Any ideas what's wrong and how to fix this?